Ok got some news for everyone to know on the situation, there was a network outage on the Canadian server, and they have to replace the server there so it should be up by tonight in a few hours "Central Standard Time", my time hopefully.

Still can't get on from desktop (any of my browsers?) all these weeks later (imslp seems to be practically the only site blocked, odder yet, it's not a general thing...), though I can connect from my mobile phone. (Fortunately, I can download PDFs from my phone, and can listen to, though -not-, it seems, download/save, mp3s.)

Still only from my phone (iPhone 6s), not from my desktop (2007 iMac running OS 10.11.6. Chrome and Safari browsers tried, cache cleared on Chrome,in both cases imslp.org cannot be reached (or absent from DNS? Not sure- if I could remember the numeric equivalent/resolved address, I'd try it. Maybe my DNS has a hole in it. Maybe my desktop IP, but not my phone, has been (accidentally?) banned (can they even have different IPs? They're on the same Wifi so I presume not anyway...) Briefly- no clue why... I can reach imslpforums no problem 't'all, it seems.

I don't know if there are other sites that I used to reach without a problem and now also run into a brick wall with my desktop but significantly not with my phone browsers, because lately I mostly use my desktop browsers when I need to, for things I haven't worked out how to do (cheaply?) with the phone...- navigate sites with Javascript, upload files to sites, download mp3s from IMSLP to hard drive (that's a no quite entirely, at the moment; at least I can play them on the phone, just not download them for offline listening...) etc.; it's a 9-year-old computer and not a speedy one either.

Eric, is it possible that the setting of the hosts file described here is still active on your computer? At that time you were the first user who confirmed that my suggested setting was OK as a workaround to the IMSLP domain suspension. IMSLP's IP address has changed since then, so, if that setting is still active, your computer may still be trying to reach the old IP address!

A clean reinstall of the Operating System would not be a bad idea with a system that old by now! This way your computer goes back to factory default for settings (except for the OS number itself, which would be the same number) and that any issues with your browser would clear up.